Schema transformer unit test 'test_vrf_assign_rules' frequently fails

[Édouard Thuleau]

It fails because the unit test framework failed to start schema transformer with that error:

Traceback (most recent call last):
  File "/home/zuul/contrail_repo/build/debug/config/schema-transformer/.venv/local/lib/python2.7/site-packages/gevent/greenlet.py", line 454, in run
    result = self._run(*self.args, **self.kwargs)
  File "../common/tests/test_common.py", line 366, in launch_schema_transformer
    to_bgp.main(args_str)
  File "schema_transformer/to_bgp.py", line 721, in main
    st_logger, args)
  File "/home/zuul/contrail_repo/build/debug/config/schema-transformer/.venv/local/lib/python2.7/site-packages/cfgm_common/zkclient.py", line 506, in master_election
    self._election.run(func, *args, **kwargs)
  File "../common/tests/test_utils.py", line 1201, in run
    cb(*args, **kwargs)
  File "schema_transformer/to_bgp.py", line 665, in run_schema_transformer
    transformer = SchemaTransformer(st_logger, args)
  File "schema_transformer/to_bgp.py", line 198, in __init__
    self.reinit()
  File "schema_transformer/to_bgp.py", line 351, in reinit
    VirtualMachineInterfaceST.reinit()
  File "schema_transformer/config_db.py", line 152, in reinit
    for obj in cls.list_vnc_obj():
  File "/home/zuul/contrail_repo/build/debug/config/schema-transformer/.venv/local/lib/python2.7/site-packages/cfgm_common/vnc_db.py", line 382, in list_vnc_obj
    obj_dicts = cls.list_obj(obj_type, fields)
  File "/home/zuul/contrail_repo/build/debug/config/schema-transformer/.venv/local/lib/python2.7/site-packages/cfgm_common/vnc_db.py", line 373, in list_obj
    field_names=fields)
  File "/home/zuul/contrail_repo/build/debug/config/schema-transformer/.venv/local/lib/python2.7/site-packages/cfgm_common/vnc_cassandra.py", line 521, in wrapper
    return func(*args, **kwargs)
  File "/home/zuul/contrail_repo/build/debug/config/schema-transformer/.venv/local/lib/python2.7/site-packages/cfgm_common/vnc_cassandra.py", line 898, in object_read
    raise NoIdError(obj_uuids[0])
NoIdError: Unknown id: cd733cbb-3f0e-4f37-be87-152b6ce1c657
<Greenlet at 0x7f89fca8d2d0: launch_schema_transformer('TestServicePolicy', 'test.test_service_policy.TestServicePolicy.test_v, '172.16.9.4', 53428, None)> failed with NoIdError

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/47158
Submitter: Yijie Xiao (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/47183
Submitter: Édouard Thuleau (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/47183
Committed: http://github.com/Juniper/contrail-controller/commit/a32a3c557cbab11118cf10e9f236dbf39c5f77fd
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master

commit a32a3c557cbab11118cf10e9f236dbf39c5f77fd
Author: Édouard Thuleau <email address hidden>
Date: Mon Oct 22 12:28:05 2018 +0200

[config] fix resource type listing in common vnc_db code

The python common lib used by config services (schema-transformer,
svc-monitor...) uses the 'vnc_cassandra.object_read' to list all resources
for a type. That method requires a list of resource UUIDs to be read but
in case that list contains only one UUID and that UUID does not exists
anymore, the 'object_read' method raises a NoIdError exception instead
returning an empty list.

Change-Id: I743767f1e441fb26f726bc0acdc8aa29e2ef74f9
Closes-Bug: #1798765

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/47284
Submitter: Édouard Thuleau (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/47284
Committed: http://github.com/Juniper/contrail-controller/commit/577558f3ea92301f58da373ed65b4690769f9571
Submitter: Zuul v3 CI (<email address hidden>)
Branch: R5.0

commit 577558f3ea92301f58da373ed65b4690769f9571
Author: Édouard Thuleau <email address hidden>
Date: Mon Oct 22 12:28:05 2018 +0200

[config] fix resource type listing in common vnc_db code

The python common lib used by config services (schema-transformer,
svc-monitor...) uses the 'vnc_cassandra.object_read' to list all resources
for a type. That method requires a list of resource UUIDs to be read but
in case that list contains only one UUID and that UUID does not exists
anymore, the 'object_read' method raises a NoIdError exception instead
returning an empty list.

Change-Id: I743767f1e441fb26f726bc0acdc8aa29e2ef74f9
Closes-Bug: #1798765
(cherry picked from commit a32a3c557cbab11118cf10e9f236dbf39c5f77fd)